July 30 A 41-year-old stretch of pipeline
operated by Calgary-based Enbridge Inc. (ENB.TO) ruptured in
southern Michigan on Monday, spilling between 800,000 and 1
million gallons (19,047 to 23,809 barrels) of crude into a
creek feeding the Kalamazoo River, which flows into Lake
The spill ranks as one of the largest from a pipeline in
recent U.S. history. A notorious BP (BP.L) pipeline spill in
Alaska in 2006 was less than one-third of the size of the
Enbridge pipeline spill this week.
Enbridge had several major pipeline spills in the United
States over the last decade. Below is a fact-box detailing
recent Enbridge pipeline incidents and spills in the country.
After this week's spill, Enbridge has been working to
contain the crude with booms in the water, to reduce risks that
it could reach Lake Michigan. As much as 6,000 barrels of crude
have been removed from the water so far.
The spill could lead to more scrutiny of U.S. pipeline
activities and Enbridge, Canada's top pipe operator.
Canada is the top supplier of crude oil to the United
States, and Canadian crude imports are expanding quickly. A
congressional staffer told Reuters that members of the House
Transportation and Oversight Committee are probing the latest
Earlier this year, the U.S. Department of Transportation
sent Enbridge a warning letter, threatening fines if the
company failed to improve corrosion-testing on another stretch
of the ruptured Enbridge pipeline, known as 6B. The line, which
runs from Ontario, Canada to Indiana, can transport 190,000
barrels (8 million gallons) per day.
* January, 2010: An Enbridge pipeline leaks around 3,000
barrels (126,000 gallons) of crude near Neche, North Dakota.
Authorities order Enbridge to reduce pressures on the line, and
in a letter to Enbridge, raise concerns over the strength of
some of its pipeline seams.
* November, 2007: Two workers are killed after an
Enbridge-operated pipeline catches fire in Northern Minnesota.
The same line had recently been repaired. Following the
incident, which resulted in a pipeline closure, up to 20
percent of U.S. crude imports were temporarily halted. Enbridge
was fined for having allowed pressure on the pipeline to exceed
* January, 2007: A spill on an Enbridge line that
transports Canadian crude to Chicago, Illinois leaks around
50,000 gallons (1,190 barrels) of crude in rural Wisconsin.
About a month later, and further north, the pipeline again
spills around 125,000 gallons (2,976 barrels) after a
construction crew breaks the line.
* 2005: Enbridge spills more than 412,650 gallons (9,825
barrels) of oil in several incidents over the year, according
to National Wildlife Federation data compiling spill volumes.
Most oil is quickly contained by Enbridge.
* June, 2003: Enbridge spills around 19,000 gallons (452
barrels) in Wisconsin's Nemadji River, and additional crude
spilled from an Enbridge terminal is contained.
* July, 2002: 252,000 gallons (6,000 barrels) spill from an
Enbridge pipeline into marshlands near Cohasset, Minnesota.
*Sources: Department of Transportation documents,
Enbridge spill reports, spill data compiled by the National
Wildlife Federation, SEC filings.
(Reporting by Joshua Schneyer and Selam Gebrekidan.)